F1951NBGI8
DESCRIPTION
This document describes the specification for the F1951 Digital Step Attenuator. The F1951 is part of a family of Glitch-Free TM DSAs optimized for the demanding requirements of munications Infrastructure. These devices are offered in a pact 4x4 QFN package with 50 Ω impedances for ease of integration into the radio system.
PETITIVE ADVANTAGE
Digital step attenuators are used in Receivers and Transmitters to provide gain control. The F1951 is a 6bit step attenuator optimized for these demanding applications. The silicon design has very low insertion loss and low distortion (+65 d Bm IP3I.). The device has pinpoint accuracy and settles to final attenuation value within 400 nsec. Most importantly, the F1951 includes Renesas’ Glitch-Free TM technology which results in less than 0.6 d B of overshoot ringing during MSB transitions. This is in stark contrast to peting DSAs that glitch as much as 10 d B during MSB transitions (see p.10).
- Lowest insertion loss for best SNR
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